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rfc:rfc6725

Internet Engineering Task Force (IETF) S. Rose Request for Comments: 6725 NIST Category: Standards Track August 2012 ISSN: 2070-1721

    DNS Security (DNSSEC) DNSKEY Algorithm IANA Registry Updates

Abstract

 The DNS Security Extensions (DNSSEC) require the use of cryptographic
 algorithm suites for generating digital signatures over DNS data.
 The algorithms specified for use with DNSSEC are reflected in an
 IANA-maintained registry.  This document presents a set of changes
 for some entries of the registry.

Status of This Memo

 This is an Internet Standards Track document.
 This document is a product of the Internet Engineering Task Force
 (IETF).  It represents the consensus of the IETF community.  It has
 received public review and has been approved for publication by the
 Internet Engineering Steering Group (IESG).  Further information on
 Internet Standards is available in Section 2 of RFC 5741.
 Information about the current status of this document, any errata,
 and how to provide feedback on it may be obtained at
 http://www.rfc-editor.org/info/rfc6725.

Copyright Notice

 Copyright (c) 2012 IETF Trust and the persons identified as the
 document authors.  All rights reserved.
 This document is subject to BCP 78 and the IETF Trust's Legal
 Provisions Relating to IETF Documents
 (http://trustee.ietf.org/license-info) in effect on the date of
 publication of this document.  Please review these documents
 carefully, as they describe your rights and restrictions with respect
 to this document.  Code Components extracted from this document must
 include Simplified BSD License text as described in Section 4.e of
 the Trust Legal Provisions and are provided without warranty as
 described in the Simplified BSD License.

Rose Standards Track [Page 1] RFC 6725 IANA Registry Update August 2012

Table of Contents

 1. Introduction ....................................................2
 2. The DNS Security Algorithm Numbers Sub-Registry .................2
    2.1. Updates and Additions ......................................2
    2.2. DNS Security Algorithm Numbers Sub-Registry Table ..........3
 3. IANA Considerations .............................................4
 4. Security Considerations .........................................4
 5. Informative References ..........................................4

1. Introduction

 The Domain Name System (DNS) Security Extensions (DNSSEC, defined by
 [RFC4033], [RFC4034], [RFC4035], [RFC4509], [RFC5155], and [RFC5702])
 use digital signatures over DNS data to provide source authentication
 and integrity protection.  DNSSEC uses an IANA registry to list codes
 for digital signature algorithms (consisting of an asymmetric
 cryptographic algorithm and a one-way hash function).
 This document updates a set of entries in the IANA registry titled
 "DNS Security (DNSSEC) Algorithm Numbers".  These updated entries are
 given in Section 2.2 below.  This list includes changes to selected
 entries originally set aside for future algorithm specification that
 did not occur.  These three entries are changed to "Reserved" to
 avoid potential conflicts with older implementations.  This document
 also brings the list of references for entries up to date.
 There are auxiliary sub-registries related to the DNS Security
 (DNSSEC) Algorithm Numbers registry that deal with various Diffie-
 Hellman parameters used with DNSSEC.  These registry tables are not
 altered by this document.

2. The DNS Security Algorithm Numbers Sub-Registry

 The DNS Security Algorithm Numbers sub-registry (part of the Domain
 Name System Security (DNSSEC) Algorithm Numbers registry) contains a
 set of entries that contain errors.  There are additional differences
 to entries that are described in Section 2.1, and the complete list
 of changed registry entries is in Section 2.2.

2.1. Updates and Additions

 This document updates three entries in the Domain Name System
 Security (DNSSEC) Algorithm Numbers registry:
 The description for assignment number 4 is changed to "Reserved".
 The description for assignment number 9 is changed to "Reserved".

Rose Standards Track [Page 2] RFC 6725 IANA Registry Update August 2012

 The description for assignment number 11 is changed to "Reserved".
 The above entries are changed to "Reserved" because they were
 placeholders for algorithms that were not fully specified for use
 with DNSSEC.  Older implementations may still have these algorithm
 codes assigned, so these codes are reserved to prevent potential
 incompatibilities.

2.2. DNS Security Algorithm Numbers Sub-Registry Table

 The list of DNS Security Algorithm Numbers sub-registry entry changes
 is given below.  All other existing entries in the sub-registry table
 are unchanged by this document and are not shown.  The other two
 sub-registries in the Domain Name System Security (DNSSEC) Algorithm
 Numbers registry (DNS KEY Record Diffie-Hellman Prime Lengths and DNS
 KEY Record Diffie-Hellman Well-Known Prime/Generator Pairs) are not
 changed in any way by this document.
                                        Zone     Trans.
  Number  Description       Mnemonic   Signing   Sec.       Reference
  ------  -----------       --------   -------   ---------  ---------
    0      Reserved                                         [RFC4034],
                                                            [RFC4398]
    1      RSA/MD5          RSAMD5        N         Y       [RFC3110],
           (deprecated;                                     [RFC4034]
           see 5)
    4      Reserved                                         [RFC6725]
    5      RSA/SHA-1        RSASHA1       Y         Y       [RFC3110],
                                                            [RFC4034]
    9      Reserved                                         [RFC6725]
   11      Reserved                                         [RFC6725]
 15-122    Unassigned
 123-251   Reserved                                         [RFC4034],
                                                            [RFC6014]
   253     private          PRIVATEDNS    Y         Y       [RFC4034]
           algorithm
   254     private          PRIVATEOID    Y         Y       [RFC4034]
           algorithm OID

Rose Standards Track [Page 3] RFC 6725 IANA Registry Update August 2012

3. IANA Considerations

 This document updates a set of DNS Security Algorithm Numbers
 sub-registry entries as given in Section 2.2.  The changes include
 moving three registry entries to "Reserved" and updating the
 reference list for entries.

4. Security Considerations

 This document updates the Domain Name System Security (DNSSEC)
 Algorithm Numbers registry.  It is not meant to be a discussion on
 algorithm superiority.  No new security considerations are raised in
 this document.

5. Informative References

 [RFC3110]  Eastlake, D., "RSA/SHA-1 SIGs and RSA KEYs in the Domain
            Name System (DNS)", RFC 3110, May 2001.
 [RFC4033]  Arends, R., Austein, R., Larson, M., Massey, D., and S.
            Rose, "DNS Security Introduction and Requirements",
            RFC 4033, March 2005.
 [RFC4034]  Arends, R., Austein, R., Larson, M., Massey, D., and S.
            Rose, "Resource Records for the DNS Security Extensions",
            RFC 4034, March 2005.
 [RFC4035]  Arends, R., Austein, R., Larson, M., Massey, D., and S.
            Rose, "Protocol Modifications for the DNS Security
            Extensions", RFC 4035, March 2005.
 [RFC4398]  Josefsson, S., "Storing Certificates in the Domain Name
            System (DNS)", RFC 4398, March 2006.
 [RFC4509]  Hardaker, W., "Use of SHA-256 in DNSSEC Delegation Signer
            (DS) Resource Records (RRs)", RFC 4509, May 2006.
 [RFC5155]  Laurie, B., Sisson, G., Arends, R., and D. Blacka, "DNS
            Security (DNSSEC) Hashed Authenticated Denial of
            Existence", RFC 5155, March 2008.
 [RFC5702]  Jansen, J., "Use of SHA-2 Algorithms with RSA in DNSKEY
            and RRSIG Resource Records for DNSSEC", RFC 5702,
            October 2009.
 [RFC6014]  Hoffman, P., "Cryptographic Algorithm Identifier
            Allocation for DNSSEC", RFC 6014, November 2010.

Rose Standards Track [Page 4] RFC 6725 IANA Registry Update August 2012

Author's Address

 Scott Rose
 NIST
 100 Bureau Dr.
 Gaithersburg, MD  20899
 USA
 Phone: +1-301-975-8439
 EMail: scottr.nist@gmail.com

Rose Standards Track [Page 5]

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